Design Manager Streetscape Limited
Solid Edge ST9 [MP8] Classic [x2 seats]
So you are in an Assembly (ASM file). Here is where the tutorials/self-paced training will help you... You are attempting to place one part in relation to another. Your first part comes in with it's origin aligned with the assembly. After that, any other part you drop in is not and Solid Edge assumes you will use assembly relationships to relate the part to any other (Assemble command).
Alternatively, if you hold the CTRL key down while dragging subsequent parts in, they will also be aligned with the assembly origin which is useful if your parts are modeled spatially correct in respect of their assembly location.